11/30/2010 @ 1:00PM

In Pictures: America's 10 Silver-Collar Capitals

Washington, D.C.

Working past retirement age: 30.2%

Retirement-age unemployment rate: 4.9%

Total working-age population: 4,288,189

Working seniors: 211,924

The key to Washington’s high percentage of retirement-age workers? It might just be retired federal workers. Like a lot of other cities with large government workforces, Washington employs many people long after they’ve officially entered their golden years. In the nation’s capital, a lot of them go back to work as consultants.